<template>
  <div class="todo-header">
    <input type="text" placeholder="请输入你的任务名称，按回车键确认" @keyup.enter="handelEnter" v-model="title" />
  </div>
</template>

<script>
// 导入nonaid的包
import { nanoid } from "nanoid";
export default {
  name: 'TodoHeader',
  props: ['addtodo'],
  data() {
    return {
      title: '',
    }
  },
  methods: {
    handelEnter() {
      if (this.title.trim() !== '') {
        // 准备一个空对象
        let addobj = { id: nanoid(), title: this.title, done: false }
        // 给app组件传入的添加一个title对象
        this.addtodo(addobj);
        // console.log(addobj);
        // 添加完成将输入框值为空
        this.title = ''
      } else {
        alert('输入的标题不能为空')
      }
    }
  },
}
</script>












<style scoped>
/*header*/
.todo-header input {
  width: 560px;
  height: 28px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 7px;
}

.todo-header input:focus {
  outline: none;
  border-color: rgba(82, 168, 236, 0.8);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
}
</style>